US4153012A - Waste heat watertube boiler - Google Patents
Waste heat watertube boiler Download PDFInfo
- Publication number
- US4153012A US4153012A US05/862,024 US86202477A US4153012A US 4153012 A US4153012 A US 4153012A US 86202477 A US86202477 A US 86202477A US 4153012 A US4153012 A US 4153012A
- Authority
- US
- United States
- Prior art keywords
- gas pass
- headers
- end portions
- tubes
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1838—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines the hot gas being under a high pressure, e.g. in chemical installations
Definitions
- This invention relates generally to steam generating boilers, and more especially to waste heat boilers used to cool the effluent gas emanating from the pyrolysis furnaces of ethylene plants.
- a boiler for that purpose is disclosed in the Csathy et al. U.S. Pat. No. 3,976,033.
- this invention contemplates a watertube boiler that has no tubesheets and hence is not subject to possible tubesheet failure; in which the distributing headers and the collecting headers are basically outside the hot gas stream, so that any possible accumulation of solids in the lower distributing headers or in the steam pocket of the upper collecting headers will not cause overheating; and in which all of the water-tubes--which, of course, must be in the hot gas stream--have their upper and lower ends bent outwardly towards the headers with which they are connected, so that the tubes and especially their junctions with the headers are better able to withstand the forces of expansion and contraction than are the straight tubes of the earlier firetube versions of waste heat boilers.
- the invention resides in the combination of means defining a vertically oriented gas pass through which the hot gaseous medium flows, the gas pass having a medial portion of substantially uniform cross section connecting opposite end portions of larger cross section and an axis that is common to its medial and opposite end portions; means providing an inlet for the gas pass opening into one of said end portions; means providing an outlet for the gas pass that exits from the other one of said end portions; means defining a pair of spaced apart headers joined to each of said end portions of the gas pass, each header having a wall portion that is common to it and to its respective end portion of the gas pass; and a bank of watertubes in the gas pass, all but the end portions of each tube in said bank being in said medial portion of the gas pass and substantially parallel with its axis, and the end portions of each of said tubes being in the larger cross section end portions of the gas pass and being bent laterally outwardly towards and having the extremities thereof joined to the adjacent one of said
- FIG. 1 is a side view of a vertical watertube boiler embodying this invention
- FIG. 2 is a view at an enlarged scale, of the lower end portion of the boiler with part thereof in section;
- FIG. 3 is a cross sectional view through FIG. 2 on the plane of the line 3--3.
- the numeral 5 designates the shell of a vertically oriented watertube boiler embodying this invention.
- This shell is cylindrical and has a medial portion 6 of uniform cross section connecting upper and lower end portions 7 and 8, respectively, that are larger in cross section.
- these end portions are defined by uniform diameter cylindrical walls 9 that are connected with the uniform cross section medial portion 6 of the shell by conical walls 10.
- the lower end portion 8 of the shell has an inlet section 11 connected thereto through which the hot effluent gas to be cooled enters the boiler to flow upwardly through the gas pass formed by the shell, to a gas outlet section 12.
- the outlet section 12 forms the top of the upper end portion 7 and is connectable with a stack, not shown.
- a heat insulating lining 13 covers the wall of the inlet section 11 and also the adjacent conical wall of the lower shell portion 8, to protect these surfaces from the hot incoming effluent gas.
- the larger diameter end portions 7 and 8 of the shell have paired diametrically opposite collecting headers 14 and paired diametrically opposite distributing headers 15 respectively joined thereto.
- These headers are preferably vertically oriented cylinders with closed bottom walls 16 and truncated upper ends 17 by which the headers are connectable to ducts that lead to a steam drum 18.
- the ducts 19 that are joined to the lower-distributing headers provide the downcomers of the boiler and the ducts 20 that are joined to the upper collecting headers provide its risers.
- each header projects into the interior of the larger diameter end portion of the shell to which it is joined.
- a common wall 20 separates each header from its respective larger diameter end portion of the shell.
- each of these tubes are located in one or the other of the larger cross section end portions of the gas pass and are bent laterally outward to have their extremities joined to an adjacent one of the common walls 20.
- Each tube thus communicates one of the collecting headers with one of the distributing headers; and as also shown in FIG. 3, the laterally directed end portions 22 of the one-half of the tubes face towards and are joined to the headers at one side of the shell and those of the other half base towards and are joined to the headers at the diametrically opposite side of the shell.
- Each of the collecting headers 7 is equipped with a valved drain 24 at its bottom, and similarly at the bottom of each distributing header 8 there is a valved blow-off 24.
- Heat transfer conditions are also more favorable in a watertube boiler than in firetube boilers, because of the larger area of the outside heating surface which can be increased by the addition of extended surface in the form of spacer fins 26 (as shown in FIG. 3) to compensate for the low gas side heat transfer coefficient.
- the boiler of this invention is very well adapted for use in cooling the hot high hydrocarbon content effluent gas emanating from the pyrolysis furnaces of ethylene plants.
- An especially important feature of the invention resides in the location of the distributing and collecting headers. Since they are essentially outside the stream of hot gas passing through the boiler, any possible accumulation of solids in the distributing headers or in the steam pocket of the collecting headers, would not cause overheating.
- the headers With respect to the shape of the headers, it should be evident that they need not be cylindrical, thought that shape is no doubt best suited to fabrication. Also the curved shape of the common walls 20 facilitates uniform distribution of the junctions between the tubes with the headers, and enables each tube end to be squarely joined to the wall of the header.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/862,024 US4153012A (en) | 1977-12-19 | 1977-12-19 | Waste heat watertube boiler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/862,024 US4153012A (en) | 1977-12-19 | 1977-12-19 | Waste heat watertube boiler |
Publications (1)
Publication Number | Publication Date |
---|---|
US4153012A true US4153012A (en) | 1979-05-08 |
Family
ID=25337428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/862,024 Expired - Lifetime US4153012A (en) | 1977-12-19 | 1977-12-19 | Waste heat watertube boiler |
Country Status (1)
Country | Link |
---|---|
US (1) | US4153012A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4548162A (en) * | 1984-10-22 | 1985-10-22 | Combustion Engineering, Inc. | Slagging heat recovery unit with potassium seed recovery |
US20090300986A1 (en) * | 2008-06-05 | 2009-12-10 | Guohai Liu | Method and apparatus for cooling solid particles under high temperature and pressure |
CN104791744A (en) * | 2015-04-21 | 2015-07-22 | 张家港格林沙洲锅炉有限公司 | Double-drum pipe bending type waste heat boiler |
CN110056848A (en) * | 2018-04-23 | 2019-07-26 | 新能能源有限公司 | High temperature and high pressure flue gas afterheat utilizing system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US934679A (en) * | 1905-08-18 | 1909-09-21 | Westinghouse Machine Co | Gas-purifying apparatus. |
US1812513A (en) * | 1926-12-10 | 1931-06-30 | U G I Contracting Company | Vertical fire tube boiler |
US1907736A (en) * | 1930-11-06 | 1933-05-09 | Cheetham Hugh Southworth | Steam boiler |
US1973968A (en) * | 1933-01-23 | 1934-09-18 | Combustion Eng Corp | Waste heat boiler |
US2048308A (en) * | 1935-08-01 | 1936-07-21 | Bigelow Company | Waste heat boiler |
US3976033A (en) * | 1975-07-30 | 1976-08-24 | Deltak Corporation | Vertical firetube waste heat boiler |
-
1977
- 1977-12-19 US US05/862,024 patent/US4153012A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US934679A (en) * | 1905-08-18 | 1909-09-21 | Westinghouse Machine Co | Gas-purifying apparatus. |
US1812513A (en) * | 1926-12-10 | 1931-06-30 | U G I Contracting Company | Vertical fire tube boiler |
US1907736A (en) * | 1930-11-06 | 1933-05-09 | Cheetham Hugh Southworth | Steam boiler |
US1973968A (en) * | 1933-01-23 | 1934-09-18 | Combustion Eng Corp | Waste heat boiler |
US2048308A (en) * | 1935-08-01 | 1936-07-21 | Bigelow Company | Waste heat boiler |
US3976033A (en) * | 1975-07-30 | 1976-08-24 | Deltak Corporation | Vertical firetube waste heat boiler |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4548162A (en) * | 1984-10-22 | 1985-10-22 | Combustion Engineering, Inc. | Slagging heat recovery unit with potassium seed recovery |
US20090300986A1 (en) * | 2008-06-05 | 2009-12-10 | Guohai Liu | Method and apparatus for cooling solid particles under high temperature and pressure |
US8968431B2 (en) * | 2008-06-05 | 2015-03-03 | Synthesis Energy Systems, Inc. | Method and apparatus for cooling solid particles under high temperature and pressure |
CN104791744A (en) * | 2015-04-21 | 2015-07-22 | 张家港格林沙洲锅炉有限公司 | Double-drum pipe bending type waste heat boiler |
CN110056848A (en) * | 2018-04-23 | 2019-07-26 | 新能能源有限公司 | High temperature and high pressure flue gas afterheat utilizing system |
CN110056848B (en) * | 2018-04-23 | 2024-05-03 | 新能能源有限公司 | High-temperature high-pressure flue gas waste heat utilization system |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HELLER FINANCIAL, INC. Free format text: SECURITY INTEREST;ASSIGNOR:DELTAK CORPORATION;REEL/FRAME:005307/0089 Effective date: 19900502 |
|
AS | Assignment |
Owner name: DELTAK CORPORATION, MINNESOTA Free format text: ASSIGNMENT RELEASE AGREEMENT;ASSIGNOR:HELLER FINANCIAL, INC.;REEL/FRAME:006920/0751 Effective date: 19940128 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, ILLINOIS Free format text: SECOND AMENDMENT TO PATENT AND LICENSE SECURITY AGREEMENT;ASSIGNOR:JASON INCORPORATED;REEL/FRAME:006928/0225 Effective date: 19940131 |
|
AS | Assignment |
Owner name: DLTK, INC., MINNESOTA Free format text: MERGER;ASSIGNOR:DELTAK CORPORATION;REEL/FRAME:007534/0978 Effective date: 19940131 Owner name: JASON INCORPORATED, WISCONSIN Free format text: MERGER;ASSIGNOR:DLTK, INC.;REEL/FRAME:007534/0969 Effective date: 19940131 |
|
AS | Assignment |
Owner name: PARIBAS, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:DELTAK, L.L.C.;REEL/FRAME:009360/0613 Effective date: 19980608 |
|
AS | Assignment |
Owner name: DELTAK, L.L.C., A DELAWARE LIMITED LIABILITY COMPA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BNP PARIBAS, AS COLLATERAL AGENT;REEL/FRAME:011089/0370 Effective date: 20000801 |